From what you describe it is a Lefaucheux action and it's only drawback was that as powder technology advanced with guncotton and semi-smokeless/nitro, the action was considered weak. Many times there is "Crown" over "V"(Vorrat) on the top rib and another set of tubes if the right trigger is a French stecher/single set. Just a guess was that it was made in the late 1880s or early 1890s as that type action fell out of favor. I will also guess that the locks(I assume they are backaction) have "S&S" stamped on the back side. If you do purchase it, pleasure us with some pic especially of the flats.
Kind Regards,
Raimey
